Controlling device for phonographs



Dec. 4 1923. 1,476,277

- M. ADAIR CONTROLLING DEVICE FOR PHONOGRAPHS Filed March 29, 1920 2 Sheets-Sheet 1 IVITNESS: INVENTOR.

A ORNEY.

Dec. 4 1923.

M. A'DAIR CONTROLLING DEVICE FOR PHONOGRAPHS Filed March 29, 1920 2 Sheets-Sheet 2 WITNESS: INVENTOR. WM 461/6 ATTORNEY.

Patented Dec. 4, 1923.

MONTAGUE ADAIR, OF BROQKLYN, NE'W YORK.

CONTROLLING DEVICE FOR PHONOGEAPHS.

Application filed March 29, 1920. Serial No. 369,655.

To all whom it may concern:

Be it known that I, MONTAGUE ADAIR, a citizen of the United States, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Controlling Devices for Phonographs, of which the following is a specification.

This invention relates to phonographs and particularly to a controlling device for disc type phonographs which controls the position of the tone arm on the record and, also, controls the movement of the turntable, and has for an object to provide means for positioning the stylus oi the diaphragm head to suit different sizes of records and in combination therewith to stop the record when the tone arm moves a predetermined distance towards the centre of the record and also to release the brake oi": the turntable when the tone arm is moved to the starting position of the record. These objects are obtained by the construction shown in the accompanying drawings in which Fig. l, is a plan view of a phonograph of i the disc type with my invention in place, I Figs. 2,3 and 4 show the controlling device in difierent operating positions, Fig. 5 is a side elevation corresponding to Fig. 4-, and Fig. 6 shows details of the brake operating mechanism. a

This invention consists of an attachment operated by the movement or the tone arm which operates to apply the brake to the turntable after the record has been played and to release this brake when the tone arm is moved toward the starting position. Also it arrests the movement of the tone arm at predetermined positions on the record corresponding to the starting positions of records of various sizes, it thus enables a record to be started instantly without looking for the starting position for the styius and is particularly useful when records are played under poor light, as it enables the stylus to be placed on the starting position instantly. 1

Referring to the drawings, 11 represents the turntable of a disc type phonograph, 12 is the tone arm pivoted 111 the stand 14 at 15 and carrying the diaphragm head 13.

this connection is pivoted at the opposite end to the adjustable arm 23 which is pivoted at 29 to the base 24. This base is secured by a comparatively thin section 25 which slips underneath the stand 14 and is clamped between it and the cabinet of the phono-,

graph as indicated in Fig. 1. Ahooked arm 33 is pivoted to the base 24: at 28 and the inner end has a toothed quadrant 26 engaging the toothed quadrant 27 of arm 23, these two arms therefore move together as indicatetd by Fig. 2.

The outer end of base 21 is formed in an extended are 30 struck from the centre 15 and having the stop 31 at one end and stop 32 at the other end thereof. Pin 17 depending from the tone arm moves in this arc within the limits of stops 31 and 32. hen pin 17 is in the position shown in Fig. at which coincides with the end or" the record it engages the hook 33 and a slight additional movement applied to the tone arm in the same direction when it being changed to repeat the record, moves the arm 26 back and correspondingly moves arm 23 back with the brake connection 22'which is moved over the brake toggle obtained by spring 52 moving over the pivot 51 of brake member 16 and which eventually moves arm 26 into the position shown in Fig. 2. lhis draws the arm 23 forward and the brake lever 16 with it thus applying the brake to the turntable.

l Vhen the tone arm is swung across the I marks the extreme position of the tone arm and is adjusted to coincide with the startin position of the largest record. For records of smaller size an intermediate engaging member 35 is provided and arranged to arrest pin 17 at the required position. This member is pivoted at 36 to the base 24 and when in the position shown in Fig. 2e11- gages the stud of pivot 29 so as to arrest pin 17 when in the position shown in Fig. 3. The point of this member is formed on an incline as shown at 38 and pin 17 may, by pressure on the tone arm, be forced over this incline when it is desired to use the stop 32. For this purpose member 35 is longitudinally movable on pivot pin 36 and is held in the engaging position by spring 37 as shown. The force necessary to drive this member back when pin 17 engages it depends upon the tension of spring 37.

When the tone arm moves from the stop 32 towards stop 31 member 35 is deflected as shown in Fig. 4 with practically no resistance to the movement of the tone arm. When the hooked arm 33 is tilted as shown in F ig. 2 the lug 39 engages member 35 bringing it into the straight position again to engage pin 17 on its return movement towards stop 32.

Considerable variation may be made in the construction of this device without departing from the principles of my invention. For instance, the toothed quadrants 26 and 27 may be substituted by a connect ing link pivoted to them and providing the same relative movement as the gears.

Having thus described my invention, I

I claim:

1. In combination, a phonograph including a turntable and a tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a member secured by the pivot support of said tone arm, said member having a plurality of stops engaged by said depending member to limit the travel of said tone arm.

2. In combination, a phonograph including a turntable and a tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a device secured to said phonograph having three stops, said depending member engaging said stops and arresting said tone arm at predetermined positions and means for moving said tone arm from one of said positions to another.

3. In combination, a phonograph including a turntable and a tone arm pivoted to move across the face of said turntable, records of various diameters placed on said turntable, a member depending from said tone arm, a device secured to said phono graph engaging said depending member and means included in said device for arresting said tone arm at the beginning of each of said records.

a. In combination, a phonograph including a revolving turntable and a tone arm, said tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a brake for said turntable, a device secured by the pivot support of said tone arm operably connected with said brake, and means including said depending member for releasing said brake when said tone arm is in one position and for. applying it when in another position.

5. In combination, a phonograph including a revolving turntable supporting a record and a tone arm, said tone arm pivoted to move across the face of said record, a member. depending from said tone arm, a brake for said turntable, a device secured by the pivot support of said tone arm operabl connected to said brake, and means including said depending member for releasing said brake when said tone arm is moved to the starting position of said record.

6. In combination, a phonograph including a revolving turntable and a tone arm, said tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a brake for said turntable, a device secured to said phonograph operably connected with said brake and having limiting positions for said depending member and means whereby said depending member in one extreme position applies said brake and in the other extreme position releases said brake. I

7 In combination, a phonograph including a revolving turntable and a tone arm, said tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a device secured to said phonograph having limiting positions for said depending member and means for arresting said depending member between said limiting positions.

8. In combination, a phonograph including a revolving turntable and a tone arm, said tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a device secured to said phonograph having a limiting position for said depending member and a spring controlled member arresting said depending member before said limiting position is reached.

9. In combination, a phonograph including a revolving turntable and a tone arm, said tone arm pivoted to move across the face of said turntable, a member depending from said tone arm, a device secured to said phonograph having a spring controlled member for arresting the movement'of said tone arm when moved towards the starting position.

10. In combination, a phonograph includtion, said member being inefi'ective when the ing a revolving turntable and a tone arm, tone arm is moved in the opposite direction. said tone arm pivoted to move across the Signed at New York, in the county of New face of said turntable, a member depending York and State of New York, this 26th day 5 from said tone arm, a device secured to said of March, A. D. 1920.

phonograph having a member for arresting the movement of said tone arm in one direc- MONTAGUE ADAIR. 

